An SCVM is a special virtual machine that runs on an ESXi host. When ACOS is deployed on the VMware ESXi platform, an SCVM virtual machine must be created on each node to install ACOS.
ABS service runs on the SCVM to centrally manage disk devices (SSD/HDD) on the ESXi host. Multiple SCVMs in the cluster form a distributed storage cluster through the storage network, providing storage services for virtual machines on the VMware ESXi hosts.
Under normal circumstances, I/O requests from business virtual machines on an ESXi host are first sent to the ESXi vmkernel. The vmkernel then forwards the I/O requests to the local SCVM based on the local routing table, where the ABS Chunk service processes the received I/O requests.
